Netgear DGN2200 1.0.0.29_1.7.29_HotS – Password Disclosure

Exploit Database
109 阅读

作者： Dolev Farhi

日期： 2014-07-23
类别：
- webapps
平台：
- hardware
来源：https://www.exploit-db.com/exploits/34149/

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# Exploit Title: Password Disclosure vulnerability

# Software: NETGEAR DGN2200

# Software Link: netgear.com

# Version: DGN2200

# Author: Dolev Farhi, email: dolev(at)openflare(dot)org

# Date: 23.7.2014

# Tested on: Kali Linux

# Firmware 1.0.0.29_1.7.29_HotS

2. Vulnerability Description:

===============================

An attacker is able to extract sensitive information such as the password from the Basic Settings router page due to storing it in plaintext.

3. Steps to reproduce:

======================

Navigate to the Basic Settings page, right click in the browser -> view source/frame

html>

<head>

<title>PPPoE</title>

classes.num.all.fontFamily = "Courier";

classes.num.all.fontSize = "10pt" ;

</style>

var DisableFixedIP = false;

var DisableFixedDNS = false;

var all_wan_proto= new Array(8);

var all_pppoe_localip = new Array(8);

var all_wan_dns_sel = new Array(8);

var all_wan_dns1_pri = new Array(8);

var all_wan_dns1_sec = new Array(8);

var all_wan_nat = new Array(8);

var all_wan_fw = new Array(8);

var all_ppp_dod = new Array(8);

var all_pppoe_idletime = new Array(8);

var all_pppoe_username = new Array(8);

var all_pppoe_passwd =new Array(8);

var all_pppoe_servicename = new Array(8);

var all_is_static_ip = new Array(8);

var all_wan_isbridge = new Array(8);

function loadMultiWanInfo()

{

var cf = document.forms[0];

cf.adslChoice.selectedIndex = cf.nowchoice.value;

all_wan_proto[0] = "pppoe";

all_wan_proto[1] = "pppoe";

all_wan_proto[2] = "pppoe";

all_wan_proto[3] = "pppoe";

all_wan_proto[4] = "pppoe";

all_wan_proto[5] = "pppoe";

all_wan_proto[6] = "pppoe";

all_wan_proto[7] = "pppoe";

all_pppoe_localip[0] = "ip.add.re.ss";

all_pppoe_localip[1] = "0.0.0.0";

all_pppoe_localip[2] = "0.0.0.0";

all_pppoe_localip[3] = "0.0.0.0";

all_pppoe_localip[4] = "0.0.0.0";

all_pppoe_localip[5] = "0.0.0.0";

all_pppoe_localip[6] = "0.0.0.0";

all_pppoe_localip[7] = "0.0.0.0";

all_ppp_dod[0] = 0;

all_ppp_dod[1] = 0;

all_ppp_dod[2] = 0;

all_ppp_dod[3] = 0;

all_ppp_dod[4] = 0;

all_ppp_dod[5] = 0;

all_ppp_dod[6] = 0;

all_ppp_dod[7] = 0;

all_pppoe_idletime[0] = 0 / 60;

all_pppoe_idletime[1] = 0 / 60;

all_pppoe_idletime[2] = 0 / 60;

all_pppoe_idletime[3] = 0 / 60;

all_pppoe_idletime[4] = 0 / 60;

all_pppoe_idletime[5] = 0 / 60;

all_pppoe_idletime[6] = 0 / 60;

all_pppoe_idletime[7] = 0 / 60;

all_wan_dns_sel[0] = "0";

all_wan_dns_sel[1] = "0";

all_wan_dns_sel[2] = "0";

all_wan_dns_sel[3] = "0";

all_wan_dns_sel[4] = "0";

all_wan_dns_sel[5] = "0";

all_wan_dns_sel[6] = "0";

all_wan_dns_sel[7] = "0";

all_wan_dns1_pri[0] = "80.179.52.100";

all_wan_dns1_pri[1] = "";

all_wan_dns1_pri[2] = "";

all_wan_dns1_pri[3] = "";

all_wan_dns1_pri[4] = "";

all_wan_dns1_pri[5] = "";

all_wan_dns1_pri[6] = "";

all_wan_dns1_pri[7] = "";

all_wan_dns1_sec[0] = "80.179.55.100";

all_wan_dns1_sec[1] = "";

all_wan_dns1_sec[2] = "";

all_wan_dns1_sec[3] = "";

all_wan_dns1_sec[4] = "";

all_wan_dns1_sec[5] = "";

all_wan_dns1_sec[6] = "";

all_wan_dns1_sec[7] = "";

all_wan_nat[0] = "1";

all_wan_nat[1] = "1";

all_wan_nat[2] = "1";

all_wan_nat[3] = "1";

all_wan_nat[4] = "1";

all_wan_nat[5] = "1";

all_wan_nat[6] = "1";

all_wan_nat[7] = "1";

all_wan_fw[0] = "1";

all_wan_fw[1] = "1";

all_wan_fw[2] = "1";

all_wan_fw[3] = "1";

all_wan_fw[4] = "1";

all_wan_fw[5] = "1";

all_wan_fw[6] = "1";

all_wan_fw[7] = "1";

all_pppoe_username[0] = "user@012ISP";

all_pppoe_username[1] = "";

all_pppoe_username[2] = "";

all_pppoe_username[3] = "";

all_pppoe_username[4] = "";

all_pppoe_username[5] = "";

all_pppoe_username[6] = "";

all_pppoe_username[7] = "";

all_pppoe_passwd[0] = "MyPassword"; <--- password

all_pppoe_passwd[1] = "";

all_pppoe_passwd[2] = "";

all_pppoe_passwd[3] = "";

all_pppoe_passwd[4] = "";

all_pppoe_passwd[5] = "";

all_pppoe_passwd[6] = "";

all_pppoe_passwd[7] = "";

all_pppoe_servicename[0] = "";

all_pppoe_servicename[1] = "";

all_pppoe_servicename[2] = "";

all_pppoe_servicename[3] = "";

all_pppoe_servicename[4] = "";

all_pppoe_servicename[5] = "";

all_pppoe_servicename[6] = "";

all_pppoe_servicename[7] = "";

all_is_static_ip[0] = "0";

all_is_static_ip[1] = "0";

all_is_static_ip[2] = "0";

all_is_static_ip[3] = "0";

all_is_static_ip[4] = "0";

all_is_static_ip[5] = "0";

all_is_static_ip[6] = "0";

all_is_static_ip[7] = "0";

all_wan_isbridge[0] = "0";

all_wan_isbridge[1] = "0";

all_wan_isbridge[2] = "0";

all_wan_isbridge[3] = "0";

all_wan_isbridge[4] = "0";

all_wan_isbridge[5] = "0";

all_wan_isbridge[6] = "0";

all_wan_isbridge[7] = "0";

}

function goTestApply()

{

var winoptions = "width=640,height=480,menubar=yes,toolbar=yes,status=yes,location=yes,resizable=yes";

if(document.forms[0].runtest.value == "yes")

openDataSubWin('wtest.htm',winoptions);

}

function ChangeAdslChoice()

{

var cf = document.forms[0];

var index = cf.adslChoice.selectedIndex;

var wan_proto = all_wan_proto[index];

if (wan_proto == "dhcp" || wan_proto == "ipoa"

|| wan_proto == "mer" || wan_proto == "static" )

doTypeChange2(0);

else if (wan_proto == "pppoe")

doTypeChange2(1);

else

doTypeChange2(2);

//loadSettings(index);

//loadcheck();

}

function doTypeChange2(newIndex)

{

var tmpstr;

var cf = document.forms[0];

var index = cf.adslChoice.selectedIndex;

if (newIndex == 0)

{

tmpstr = "ether_m.cgi?nowchoice=" + index + "&nowproto=0";

location.href = tmpstr;

}

else if (newIndex == 1)

{

tmpstr = "pppoe_m.cgi?nowchoice=" + index+ "&nowproto=1";

location.href = tmpstr;

}

else if (newIndex == 2)

{

tmpstr = "pppoa_m.cgi?nowchoice=" + index+ "&nowproto=1";

location.href = tmpstr;

}

function doTypeChange3(newIndex)

{

var tmpstr;

var cf = document.forms[0];

var index = cf.adslChoice.selectedIndex;

var mux = cf.dsl_multiplex.value;

var vpi = cf.dsl_vpi.value;

var vci = cf.dsl_vci.value;

var msg = "";

if( isNumeric(cf.dsl_vpi, 255) )

msg = "VPI contains an invalid number"

if( isNumeric(cf.dsl_vci, 65536) )

msg = "VC contains an invalid number"

if (vpi < 0 || vpi > 255)

msg = "VPI is out of range [0~255]"

if (vci < 32 || vci > 65535)

msg = "VC is out of range [32~65535]"

if (msg.length > 1)

{

alert(msg);

return false;

}

if (newIndex == 0)

{

tmpstr="ether_m.cgi?nowchoice="+index+"&havetmpvar=1&gui_mode=1&tmpmux="+mux+"&tmpvpi="+vpi+"&tmpvci="+vci;

location.href = tmpstr;

}

else if (newIndex == 1)

{

tmpstr="pppoe_m.cgi?nowchoice="+index+"&havetmpvar=1&gui_mode=1&tmpmux="+mux+"&tmpvpi="+vpi+"&tmpvci="+vci;

location.href = tmpstr;

}

function setServer()

{

var cf = document.forms[0];

var stype = cf.login_type.selectedIndex;

var tmpstr;

var index = cf.adslChoice.selectedIndex;

var mux = cf.dsl_multiplex.value;

var vpi = cf.dsl_vpi.value;

var vci = cf.dsl_vci.value;

var msg = "";

if( isNumeric(cf.dsl_vpi, 255) )

msg = "VPI contains an invalid number"

if( isNumeric(cf.dsl_vci, 65536) )

msg = "VC contains an invalid number"

if (vpi < 0 || vpi > 255)

msg = "VPI is out of range [0~255]"

if (vci < 32 || vci > 65535)

msg = "VC is out of range [32~65535]"

if (msg.length > 1)

{

alert(msg);

return false;

}

if(stype==0) //pppoe

{

tmpstr="pppoe_m.cgi?nowchoice="+index+"&havetmpvar=1&gui_mode=1&tmpmux="+mux+"&tmpvpi="+vpi+"&tmpvci="+vci;

location.href = tmpstr;

}

else if(stype==1) //pppoa

{

tmpstr="pppoa_m.cgi?nowchoice="+index+"&havetmpvar=1&gui_mode=1&tmpmux="+mux+"&tmpvpi="+vpi+"&tmpvci="+vci;

location.href = tmpstr;

}

function loadcheck()

{

var cf = document.forms[0];

if (isIE())

{

cf.pppoe_username.size="24";

cf.pppoe_passwd.size="24";

}

loadhelp('BAS_mpppoe');

setIP();

setDNS();

}

function setIP()

{

var cf = document.forms[0];

var dflag = cf.WANAssign[0].checked;

setDisabled(dflag,cf.WPethr1,cf.WPethr2,cf.WPethr3,cf.WPethr4);

if (cf.WANAssign[1].checked)

{

cf.DNSAssign[1].checked = true;

setDNS();

}

DisableFixedIP = dflag;

}

function setDNS()

{

var cf = document.forms[0];

var dflag = cf.DNSAssign[0].checked;

if (cf.WANAssign[1].checked && cf.DNSAssign[0].checked)

{

cf.DNSAssign[1].checked=true;

dflag = false;

}

setDisabled(dflag,cf.DAddr1,cf.DAddr2,cf.DAddr3,cf.DAddr4,cf.PDAddr1,cf.PDAddr2,cf.PDAddr3,cf.PDAddr4);

DisableFixedDNS = dflag;

}

function checkData()

{

var cf = document.forms[0];

var msg = "";

var vpi = cf.dsl_vpi.value;

var vci = cf.dsl_vci.value;

if( isNumeric(cf.dsl_vpi, 255) )

msg = "VPI contains an invalid number"

if( isNumeric(cf.dsl_vci, 65536) )

msg = "VC contains an invalid number"

if (vpi < 0 || vpi > 255)

msg = "VPI is out of range [0~255]"

if (vci < 32 || vci > 65535)

msg = "VC is out of range [32~65535]"

msg+= checkBlank(cf.pppoe_username, "User name");

if(cf.pppoe_idletime.value.length<=0)

msg+= "Please enter idle time.\n";

else if(!_isNumeric(cf.pppoe_idletime.value))

msg+= "Invalid idle time,please enter proper numeral.\n";

if(cf.WANAssign[1].checked)

{

if(checkIP(cf.WPethr1,cf.WPethr2,cf.WPethr3,cf.WPethr4,254)||(parseInt(cf.WPethr4.value)==0))

msg+= "Invalid static IP address.\n";

cf.pppoe_localip.value = cf.WPethr1.value+'.'+cf.WPethr2.value+'.'+cf.WPethr3.value+'.'+cf.WPethr4.value;

}

else

cf.pppoe_localip.value = "0.0.0.0";

if(cf.DNSAssign[1].checked)

{

if(checkIP(cf.DAddr1,cf.DAddr2,cf.DAddr3,cf.DAddr4,254)||(parseInt(cf.DAddr4.value)==0))

msg+= "Invalid Primary DNS Address, please enter again.\n";

if(cf.PDAddr1.value.length>0)

if(checkIP(cf.PDAddr1,cf.PDAddr2,cf.PDAddr3,cf.PDAddr4,254)||(parseInt(cf.PDAddr4.value)==0))

msg+= "Invalid Secondary DNS Address, please enter again.\n";

}

if (duplicatepvcChk(vpi,vci))

msg += "duplicate PVC found!\n";

if (msg.length > 1)

{

alert(msg);

return false;

}

cf.wan_dns1_pri.value = cf.DAddr1.value+'.'+cf.DAddr2.value+'.'+cf.DAddr3.value+'.'+cf.DAddr4.value;

cf.wan_dns1_sec.value = cf.PDAddr1.value+'.'+cf.PDAddr2.value+'.'+cf.PDAddr3.value+'.'+cf.PDAddr4.value;

cf.nowchoice.value = -1;

return true;

}

function duplicatepvcChk(vpi, vci)

{

var cf = document.forms[0];

var index = cf.adslChoice.selectedIndex;

if (( index != 0) && (vpi == cf.atm0_vpi.value) && (vci == cf.atm0_vci.value) && (cf.wan0_dial.value == "1"))

return true;

if ((index != 1) && (vpi == cf.atm1_vpi.value) && (vci == cf.atm1_vci.value) && (cf.wan1_dial.value == "1"))

return true;

if ((index != 2) && (vpi == cf.atm2_vpi.value) && (vci == cf.atm2_vci.value) && (cf.wan2_dial.value == "1"))

return true;

if ((index != 3) && (vpi == cf.atm3_vpi.value) && (vci == cf.atm3_vci.value) && (cf.wan3_dial.value == "1"))

return true;

if ((index != 4) && (vpi == cf.atm4_vpi.value) && (vci == cf.atm4_vci.value) && (cf.wan4_dial.value == "1"))

return true;

if ((index != 5) && (vpi == cf.atm5_vpi.value) && (vci == cf.atm5_vci.value) && (cf.wan5_dial.value == "1"))

return true;

if ((index != 6) && (vpi == cf.atm6_vpi.value) && (vci == cf.atm6_vci.value) && (cf.wan6_dial.value == "1"))

return true;

if ((index != 7) && (vpi == cf.atm7_vpi.value) && (vci == cf.atm7_vci.value) && (cf.wan7_dial.value == "1"))

return true;

return false;

}

function resetPvc()

{

window.location.href="https://www.exploit-db.com/exploits/34149/BAS_mpppoe.htm";

}

function loadSettings(index)

{

var cf = document.forms[0];

var pppoe_localip;

var wan_dns1_pri;

var wan_dns1_sec;

var tmp;

var wan_proto;

var dod;

if (index == 100)

index = eval(cf.nowchoice.value);

loadvpivci(index);

wan_proto = all_wan_proto[index];

if (all_pppoe_localip[index].length!=0)

{

pppoe_localip=all_pppoe_localip[index].split(".");

cf.WPethr1.value = pppoe_localip[0];

cf.WPethr2.value = pppoe_localip[1];

cf.WPethr3.value = pppoe_localip[2];

cf.WPethr4.value = pppoe_localip[3];

}

var wan_dns_sel = all_wan_dns_sel[index];

if ( all_wan_dns1_pri[index].length!=0 )

{

wan_dns1_pri = all_wan_dns1_pri[index].split(".");

cf.DAddr1.value = wan_dns1_pri[0];

cf.DAddr2.value = wan_dns1_pri[1];

cf.DAddr3.value = wan_dns1_pri[2];

cf.DAddr4.value = wan_dns1_pri[3];

}

if ( all_wan_dns1_sec[index].length!=0 )

{

wan_dns1_sec = all_wan_dns1_sec[index].split(".");

cf.PDAddr1.value = wan_dns1_sec[0];

cf.PDAddr2.value = wan_dns1_sec[1];

cf.PDAddr3.value = wan_dns1_sec[2];

cf.PDAddr4.value = wan_dns1_sec[3];

}

cf.pppoe_idletime.value = all_pppoe_idletime[index];

if (all_ppp_dod[index] == 2)

cf.pppoe_idletime.disabled = true;

else

cf.pppoe_idletime.disabled = false;

//if (all_pppoe_localip[index]=="0.0.0.0")

// cf.WANAssign[0].checked = true;

//else

// cf.WANAssign[1].checked = true;

if (all_is_static_ip[index] == 1)//static ip

cf.WANAssign[1].checked = true;

else

cf.WANAssign[0].checked = true;

cf.DNSAssign[wan_dns_sel].checked = true;

if (all_wan_isbridge[index] == 1)

cf.nat_enable[2].checked = true;

else if (all_wan_nat[index] == 1)

cf.nat_enable[0].checked = true;

else

cf.nat_enable[1].checked = true;

cf.pppoe_username.value = all_pppoe_username[index];

cf.pppoe_passwd.value = all_pppoe_passwd[index];

cf.pppoe_servicename.value = all_pppoe_servicename[index];

//water

setIP();

setDNS();

}

function loadvpivci(index)

{

var cf = document.forms[0];

var multiplex;

var vpi;

var vci;

switch(index)

{

case 0:

vpi=cf.atm0_vpi.value;

vci=cf.atm0_vci.value;

multiplex=cf.atm0_encap.value;

break;

case 1:

vpi=cf.atm1_vpi.value;

vci=cf.atm1_vci.value;

multiplex=cf.atm1_encap.value;

break;

case 2:

vpi=cf.atm2_vpi.value;

vci=cf.atm2_vci.value;

multiplex=cf.atm2_encap.value;

break;

case 3:

vpi=cf.atm3_vpi.value;

vci=cf.atm3_vci.value;

multiplex=cf.atm3_encap.value;

break;

case 4:

vpi=cf.atm4_vpi.value;

vci=cf.atm4_vci.value;

multiplex=cf.atm4_encap.value;

break;

case 5:

vpi=cf.atm5_vpi.value;

vci=cf.atm5_vci.value;

multiplex=cf.atm5_encap.value;

break;

case 6:

vpi=cf.atm6_vpi.value;

vci=cf.atm6_vci.value;

multiplex=cf.atm6_encap.value;

break;

case 7:

vpi=cf.atm7_vpi.value;

vci=cf.atm7_vci.value;

multiplex=cf.atm7_encap.value;

break;

}

var tmpvarhave = "";

var tmpmux = "";

var tmpvpi = "";

var tmpvci = "";

if (tmpvarhave == 1)

{

if (multiplex != tmpmux)

cf.cfgChanged.value='1';

if (vpi != tmpvpi)

cf.cfgChanged.value='1';

if (vci != tmpvci)

cf.cfgChanged.value='1';

multiplex = tmpmux;

vpi = tmpvpi;

vci = tmpvci;

}

if (multiplex == "LLC")

cf.dsl_multiplex.selectedIndex = 0;

else

cf.dsl_multiplex.selectedIndex = 1;

cf.dsl_vpi.value=vpi;

cf.dsl_vci.value=vci;

}

function setCfgChanged()

{

var cf = document.forms[0];

cf.cfgChanged.value='1';

}

function checkTest()

{

var cf = document.forms[0];

var ret = checkData();

var winoptions = "width=640,height=480,menubar=yes,toolbar=yes,status=yes,location=yes,resizable=yes";

//var winoptions = "width=400,height=360,status=yes,resizable=yes";

if ( ret == true)

{

if (cf.cfgChanged.value=='0')

{

//openDataSubWin('wtest.htm',winoptions);

//cf.nowchoice.value = 100;

//checkData();

//document.formname.submit();

var tmpstr = "pppoe_m.cgi?nowchoice=100" + "&nowproto=0";

location.href = tmpstr;

//return true;

}

else

{

cf.testpressed.value = '1';

cf.nowchoice.value = -1;

document.formname.submit();

}

</script>

</head>

<tr>

<td colspan="2"><h1>Basic Settings</h1></td>

</tr>

<tr>

</select>

</td>

</tr>

<!-- RULE

<tr>

</tr>

<tr>

<td nowrap width="50%">Multiplexing Method</TD>

<option value="LLC">LLC-BASED</option>

<option value="VC">VC-BASED</option>

</SELECT></TD>

</TR>

<TR>

</tr>

<TR>

</tr>

-->

</tr>

<tr>

<p><a href="javascript:loadhelp('BAS_mpppoe','question')" tabindex="-1"><b>Does Your Internet Connection Require A Login?</b></a></p></td>

</tr>

<tr>

</tr>

<tr>

</tr>

<tr>

<td width="50%"><a href="javascript:loadhelp('BAS_mpppoe','isp')" tabindex="-1"><b>Encapsulation</b></a></td>

<td width="50%" align="right"><select name="login_type" onChange="setServer()"><option>PPPoE (PPP over Ethernet)</option></select></td>

</tr>

<tr>

<td><a href="javascript:loadhelp('BAS_mpppoe','login')" tabindex="-1"><b>Login</b></a></td>

</tr>

<tr>

<td><a href="javascript:loadhelp('BAS_mpppoe','password')" tabindex="-1"><b>Password</b></a></td>

</tr>

<tr>

<td nowrap><a href="javascript:loadhelp('BAS_mpppoe','serv_name')" tabindex="-1"><b>Service Name</b></a> (If Required)</td>

</tr>

<tr>

<td nowrap><a href="javascript:loadhelp('BAS_mpppoe','idletime')" tabindex="-1"><b>Idle Timeout</b></a> (In Minutes)</td>

</tr>

</tr>

<tr>

<td colspan="2"><a href="javascript:loadhelp('BAS_mpppoe','InternetIP')" tabindex="-1"><b>Internet IP Address</b></a></td>

</tr>

<tr>

<td colspan="2"><input type="radio" name="WANAssign" value="Dynamic" onClick="setIP()" onChange="setCfgChanged()">Get Dynamically From ISP</td>

</tr>

<tr>

<td nowrap><input type="radio" name="WANAssign" value="Fixed" onClick="setIP()" onChange="setCfgChanged()">Use Static IP Address</td>

<input type="text" name="WPethr1" class="num" size="4" maxlength="3" onFocus="if(DisableFixedIP) this.blur()" onChange="setCfgChanged()">.

<input type="text" name="WPethr2" class="num" size="4" maxlength="3" onFocus="if(DisableFixedIP) this.blur()" onChange="setCfgChanged()">.

<input type="text" name="WPethr3" class="num" size="4" maxlength="3" onFocus="if(DisableFixedIP) this.blur()" onChange="setCfgChanged()">.

</tr>

</tr>

<tr>

<td colspan="2"><a href="javascript:loadhelp('BAS_mpppoe','DNSaddress')" tabindex="-1"><b>Domain Name Server (DNS) Address </b></a></td>

</tr>

<tr>

<td colspan="2"><input type="radio" name="DNSAssign" value="0" onClick="setDNS()" onChange="setCfgChanged()"> Get Automatically From ISP</td>

</tr>

<tr>

<td colspan="2"><input type="radio" name="DNSAssign" value="1" onClick="setDNS()" onChange="setCfgChanged()"> Use These DNS Servers</td>

</tr>

<tr>

<td><img src="https://www.exploit-db.com/exploits/34149/spacer.gif" width="20" height="12" border="0">Primary DNS</td>

<input type="text" name="DAddr1" class="num" size="4" maxlength="3" onFocus="if(DisableFixedDNS) this.blur()" onChange="setCfgChanged()">.

<input type="text" name="DAddr2" class="num" size="4" maxlength="3" onFocus="if(DisableFixedDNS) this.blur()" onChange="setCfgChanged()">.

<input type="text" name="DAddr3" class="num" size="4" maxlength="3" onFocus="if(DisableFixedDNS) this.blur()" onChange="setCfgChanged()">.

</tr>

<tr>

<td><img src="https://www.exploit-db.com/exploits/34149/spacer.gif" width="20" height="12" border="0"><a href="javascript:loadhelp('BAS_mpppoe','DNSaddress')" tabindex="-1">Secondary DNS</a></td>

<input type="text" name="PDAddr1" class="num" size="4" maxlength="3" onFocus="if(DisableFixedDNS) this.blur()" onChange="setCfgChanged()">.

<input type="text" name="PDAddr2" class="num" size="4" maxlength="3" onFocus="if(DisableFixedDNS) this.blur()" onChange="setCfgChanged()">.

<input type="text" name="PDAddr3" class="num" size="4" maxlength="3" onFocus="if(DisableFixedDNS) this.blur()" onChange="setCfgChanged()">.

</tr>

</tr>

<tr>

<td colspan="2"><a href="javascript:loadhelp('BAS_mpppoe','nat')" tabindex="-1"><b>NAT (Network Address Translation) </b></a></td>

</tr>

<tr>

<input type="radio" name="nat_enable" value="1" onChange="setCfgChanged()"> Enable

<input type="radio" name="nat_enable" value="0" onChange="setCfgChanged()"> Disable

<input type="radio" name="nat_enable" value="2" onChange="setCfgChanged()"> Bridge

</td>

</tr>

</tr>

<tr>

</div></td></tr>

</table>

</form>

<p></p>

</body>

</html>